linux-kernel - Re: linux-stable-5.10-y CVE-2022-1508 of io

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Message-ID: <31ae3426-b835-3a3f-f6d1-aecad24066e8@gmail.com>
Date:   Fri, 6 May 2022 16:57:09 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, Guo Xuenan <guoxuenan@...wei.com>
Cc:     lee.jones@...aro.org, linux-kernel@...r.kernel.org,
        io-uring@...r.kernel.org, yi.zhang@...wei.com, houtao1@...wei.com
Subject: Re: linux-stable-5.10-y CVE-2022-1508 of io_uring module

On 5/6/22 03:16, Jens Axboe wrote:
> On 5/5/22 8:11 AM, Guo Xuenan wrote:
>> Hi, Pavel & Jens
>>
>> CVE-2022-1508[1] contains an patch[2] of io_uring. As Jones reported,
>> it is not enough only apply [2] to stable-5.10.
>> Io_uring is very valuable and active module of linux kernel.
>> I've tried to apply these two patches[3] [4] to my local 5.10 code, I
>> found my understanding of io_uring is not enough to resolve all conflicts.
>>
>> Since 5.10 is an important stable branch of linux, we would appreciate
>> your help in solving this problem.
> 
> Yes, this really needs to get buttoned up for 5.10. I seem to recall
> there was a reproducer for this that was somewhat saner than the
> syzbot one (which doesn't do anything for me). Pavel, do you have one?

No, it was the only repro and was triggering the problem
just fine back then

-- 
Pavel Begunkov